I don't think he changed really, maybe it is just because you grew up and finally noticed how bland and undeveloped Leon is?

fix'd

Ok, now name 5 personality traits of Leon's RE4 persona if you can.

i don't have the time. they are a lot.

No, Leon never had and probably never will have any personality at all, actually most of the characters from the series are boring and bland, but Leon is definitely the one most overrated. Seriously, RE4's fans, give me ANY reason to like Leon besides 'OMG he is so badass!'...